ENGINE - COMBUSTION SECTION - IMPROVED PACKAGE 1 COMBUSTION LINER HEAD IN C263 MATERIAL

AND LOCAL THICKENED DIFFUSER WALLS AROUND STRUTS - MOD.72-9670

1. Planning Information

A. Effectivity

(1) Lockheed L-1011

RB211-524B-02, -524B-02/10, -524B-02/11, -524B-02/12, -524B-02/14,

-524B-B-02, -524B-B-02/10, -524B-B-02/11, -524B-B-02/12, -524B-B-02/14

Engines prior to Serial No.14592

RB211-524 Modules -M04204, -M04553AA, -M04553AB, -M04553AC, -M04562AA,

-M04562AB, -M04580AA, -M04580AB, -M04580AC, -M04580AD, -M04580AE,

-M04580AF prior to Serial No.CM5111

RB211-524B3-02 Engines prior to Serial No.14638

RB211-524 Modules -M04206, -M04556AA, -M04556AB, -M04556AC, -M04564AA,

-M04564AB prior to Serial No.CM5244

RB211-524B4-02, -524B4-02/10, -524B4-02/11, -524B4-D-02, -524B4-D-02/10,

-524B4-D-02/11 Engines prior to Serial No.14883

RB211-524 Modules -M04501AA, -M04501AB, -M04501AC, -M04501AD, -M04501AE,

-M04501AF, -M04503AA, -M04503AB, -M04503AC, -M04503AD, -M04503AJ,

-M04503AK, -M04576AA, -M04576AB, -M04577AA, -M04577AB, -M04578AA,

-M04578AC, -M04579AA, -M04579AC, -M04706AA, -M04707AA, -M04708AA,

-M04709AA, -M04716AA, -M04717AA, -M04718AA, -M04718AB, -M04720AA,

-M04721AA, -M04722AA, -M04722AB, -M04729AA, -M04729AB prior to Serial

No.CM5607

(2) Boeing 747

RB211-524B2-19, -524B2-19/12, -524B2-B-19, -524B2-B-19/12 Engines prior

to Serial No.12073

RB211-524 Modules -M04204, -M04209, -M04553AA, -M04553AB, -M04553AC,

-M04557AA, -M04557AB, -M04557AE, -M04562AA, -M04562AB, -M04563AA,

-M04563AC, -M04566AA, -M04566AB, -M04566AC, -M04566AD, -M04566AE,

-M04566AF prior to Serial No.CM7099

RB211-524C2-19, -524C2-19/12, -524C2-19/16, -524C2-B-19, -524C2-B-19/12,

-524C2-B-19/16 Engines prior to Serial No.12319

RB211-524 Modules -M04209, -M04557AA, -M04557AB, -M04557AC, -M04557AD,

-M04557AE, -M04557AF, -M04563AA, -M04563AB, -M04563AC, -M04563AD,

-M04565AA, -M04566AA, -M04566AB, -M04566AC, -M04566AD, -M04566AE,

-M04566AF prior to Serial No.CM7344

RB.211−72−9670

Aug.27/93 Page 1 of 49

Printed in Great Britain
RB211-524D4-19, -524D4-19/11, -524D4-19/12, -524D4-19/15, -524D4-19/17,

-524D4-19/18, -524D4-19/19, -524D4-19/21, -524D4-19/22, -524D4X-19,

-524D4X-19/11, -524D4X-19/12, -524D4X-19/15, -524D4X-19/17,

-524D4X-19/18, -524D4X-19/19, -524D4X-19/21, -524D4X-19/22, -524D4-B-19,

-524D4-B-19/11, -524D4-B-19/12, -524D4-B-19/15, -524D4-B-19/17,

-524D4-B-19/18, -524D4-B-19/19, -524D4-B-19/21, -524D4-B-19/22,

-524D4X-B-19, -524D4X-B-19/11, -524D4X-B-19/12, -524D4X-B-19/15,

-524D4X-B-19/17, -524D4X-B-19/18, -524D4X-B-19/19, -524D4X-B-19/21,

-524D4X-B-19/22 Engines prior to Serial No.12790

RB211-524 Modules -M04502AA, -M04502AB, -M04502AC, -M04502AD, -M04502AE,

-M04502AF, -M04505AA, -M04505AB, -M04505AC, -M04505AD, -M04505AE,

-M04505AF, -M04590AA, -M04590AB, -M04590AC, -M04590AD, -M04590AE,

-M04590AF prior to Serial No.CM7806

RB211-524D4-39, -524D4-B-39 Engines prior to Serial No.12561

RB211-524 Modules -M04506AA, -M04506AB, -M04506AC, -M04506AD, -M04574AA,

-M04574AB, -M04574AC, -M04574AD, -M04594AA, -M04594AB, -M04594AC,

-M04594AD prior to Serial No.CM3961

B. Reason

(1) Problem

Cracking of the front combustion liner head assembly can occur after

extended use.

(2) Evidence

There have been incidents on engines in service of this problem.

(3) Substantiation

The changes introduced by this Service Bulletin have completed over 1000

cycles of development engine testing at temperature conditions in excess

of those likely to be encountered by engines in service after which the

combustor was found to be in good condition.

Engineering analysis confirms a reduction in stresses in the affected

area when a strengthened head is incorporated and the problem is

alleviated.

(4) Objective

Incorporation of the changes introduced by this Service Bulletin

(Modification) is designed to maintain reliability.

(5) Effect of bulletin on:

RB.211−72−9670

Aug.27/93 Page 2

Printed in Great Britain
Operation Not affected

Maintenance Not affected

Overhaul Not affected

Repair Schemes Affected (see 1.J.)

Interchangeability Not affected

C. Description

(1) The changes introduced by this Service Bulletin are as follows:

A revised front combustion liner assembly is introduced similar to the

existing item except for the following:

(a) The combustion liner head with diffuser, diffuser walls and bleed

offtake struts is produced in C263 material instead of N75 material.

(b) Reduced axial length bleed offtake struts with increased leading edge

radius.

(c) Local thickening of diffuser walls around struts.

(2) Existing front combustion liner assemblies can be reworked, see Fig.1 to

11.

(3) Part 1 of S.B.

A head section assembly is required to accomplish rework of the front

combustion liner, see Fig.1 to 4 and 11.

Part 2 of S.B.

A head outer shell section assembly is required to accomplish rework of

the front combustion liner, see Fig.5 to 11.

NOTE: It is permissible, on front combustion liners incorporating

S.B.RB211-72-8952 (see 1.J.) to use the modification kit from part 2 to

achieve the part 1 standard.

(4) For relationship with other Service Bulletins see 1.J.

(5) This Service Bulletin is in two parts as follows:

Part 1 New production and rework existing front combustion liner

assemblies.

Part 2 Rework existing front combustion liner assemblies not

incorporating S.B.RB211-72-8952.

D. Compliance

OPTIONAL

RB.211−72−9670

Aug.27/93 Page 3

Printed in Great Britain
Rolls-Royce recommends accomplishment of this Service Bulletin (Modification)

when stocks of pre-modification standard parts have been used up.

E. Approval

Modification 72-9670 was approved by a representative of the United Kingdom

Civil Aviation Authority (C.A.A.) on June 3/93

The contents of this Service Bulletin are approved under the authority of

C.A.A. Approval No.DAI/9000/84.

F. Manpower

Estimated manhours:

(1) In service .. .. .. Not applicable

(2) At overhaul .. .. .. Refer Accomplishment Instructions:

Part 2.B.: 20 hours

Part 2.C.: 40 hours (excluding any

repairs which may be

required).

NOTE: The parts affected by this Service Bulletin are accessible at overhaul.

G. Material - Price and Availability

Modification kit not required; parts supplied as single line items.

For prices and availability of future spares, see supplement to this bulletin.

H. Tooling - Price and Availability

For prices and availability, see supplement to this bulletin.

Usage

Part No. Description A.M.O. Function

Additional tools

MH13402 Location ring * Locate combustion liner head

section and inner wall

whilst tack welding

MH13403/1 Argon backing * Supply argon backing whilst

block welding replacement

combustion liner head

section to combustion liner

inner wall

RB.211−72−9670

Aug.27/93 Page 4

Printed in Great Britain
MH13406/1 Argon backing * Supply argon backing whilst

block welding replacement

combustion liner head

section to combustion liner

outer wall

MH13432/2 Location clamp * Locate combustion liner

ring (inner wall) inner wall whilst tack

welding to replacement

combustion liner head

section. Locate during post

weld inspection

MH13434 Check gauge * Post weld inspect position

(inner wall) of inner wall

MH13775/2 Location clamp * Locate combustion liner

ring (outer wall) outer wall whilst tack

welding to replacement

combustion liner head

section. Locate during post

weld inspection

MH13814 Check gauge * Post weld inspect position

(outer wall) of outer wall

MH16253 Checking and * Hold combustion liner

welding fixture component parts and tooling

components during tack

welding and post weld

inspection

HC22892 Insert tool * Insert wire thread insert

3405528 Tang removal tool * Remove tang from fitted wire

thread insert

HCU5037 Thread gauge * Inspect fitted wire thread

insert threads

HC21740 Torque check plug * Check fitted wire thread

insert torque

HC21743 Torque adapter * Check fitted wire thread

insert torque

1704302 Torquemaster * Check fitted wire thread

insert torque

RB.211−72−9670

Aug.27/93 Page 5

Printed in Great Britain
A- accomplishment

Usage column abbreviationM- maintenance

O- overhaul

I. Weight and Balance

(1) Weight change .. .. .. plus 0,77 Kg. (1.7 lb.)

(2) Moment arm .. .. .. .. 1219 mm. (48in.) rearward

(3) Datum .. .. .. .. .. Engine front mount centreline

J. References

(1) All engines

This Service Bulletin supersedes the following RB211 Service Bulletins:

Parts 1 and 2 of S.B.

72-8980 Combustion section - Front combustion liner (hairpin standard) -

Stiffened cabin air off-take struts

72-9122 Combustion liners - Front combustion liner assembly with the P4

air transfer pillar bosses in revised material

Part 1 of S.B.

72-8952 Combustion - Front combustion liner assemblies (Pre-RB211

Mod.72-7998) with aluminised heatshields.

(2) RB211-524B4-02, -524B4-D-02, -524D4-19, -524D4-B-19, -524D4X-19,

-524D4X-B-19, -524D4-39, -524D4-B-39 engines.

This Service Bulletin only applies to engines not incorporating the

following Service Bulletin:

72-7998 Engine - Combustion section - Phase 2 low emission front

combustion liner with Parker Hannifin fuel spray nozzles

(3) Engine Manual, 72-41-13, Removal and Installation, 72-41-00, Disassembly

and Assembly.

(4) Engine Overhaul Processes Manual, T.S.D.594-J, TASK 70-00-00-100-101,

70-00-00-200-210, 70-00-00-200-213, 70-00-00-300-409.

(5) Repair Schemes FRS3002, 5366 and 5449.

(6) Standard Practices Manual, TASK 70-42-13-300-001.

RB.211−72−9670

Aug.27/93 Page 6

Printed in Great Britain
K. Other Publications Affected

(1) For affect on Illustrated Parts Catalogue (I.P.C.) refer to 3. Material

Information.

RB.211−72−9670

Aug.27/93 Page 7

Printed in Great Britain
2. Accomplishment Instructions

A. The front combustion liner assembly introduced by this Service Bulletin is

interchangeable with existing. Remove and install in accordance with current

overhaul procedure (Engine Manual, 72-41-13, Removal and Installation,

72-41-00, Disassembly and Assembly)

B. Rework existing front combustion liner assembly (UL16885, UL26916, UL27107,

UL28972, UL28974) (72-41-13, Fig./Item No.02250) - Part 1 of S.B.

Consumable Materials

OMat 508 Polishing buff

OMat 3/62 C263 material weld filler wire

Tools

Tool Number Description Function

MH13402 Location ring Locate combustion liner head section

and inner wall whilst tack welding

MH13403/1 Argon backing block Supply argon backing whilst welding

replacement combustion liner head

section to combustion liner inner

walls

MH13406/1 Argon backing block Supply argon backing whilst welding

replacement combustion liner head

section to combustion liner outer wall

MH13432/2 Location clamp ring Locate combustion liner inner wall

(inner wall) whilst tack welding to replacement

combustion liner head section. Locate

during post weld inspection

MH13434 Check gauge Post weld inspect position of inner

(inner wall) wall

MH13775/2 Location clamp ring Locate combustion liner outer wall

(outer wall) whilst tack welding to replacement

combustion liner head section. Locate

during post weld inspection.

MH13814 Check gauge Post weld inspect position of outer

(outer wall) wall

MH16253 Checking and Hold combustion liner component parts

welding fixture and tooling components during tack

welding and post weld inspection

RB.211−72−9670

Aug.27/93 Page 8

Printed in Great Britain
HC22892 Insert tool Insert wire thread insert

3405528 Tang removal tool Remove tang from fitted wire thread

insert

HCU5037 Thread gauge Inspect fitted wire thread insert

threads

HC21740 Torque check plug Check fitted wire thread insert

torque

HC21743 Torque adapter Check fitted wire thread insert

torque

1704302 Torquemaster Check fitted wire thread insert

torque

Procedure Supplementary Information

(1) Machine, to separate liner head Refer to Fig.1 and 2.

assy from inner and outer walls Pack under front lip as required and

clamp to machine table. Cut into

head section leaving a trim

allowance on inner and outer walls.

Discard head assembly.

Use vertical lathe

(2) Machine inner and outer walls Refer to Fig.1 and 2.

to length as required for Use vertical lathe

re-fitting

(3) Deburr

(4) Remove thermal barrier coating Refer to Fig.1 and 2 and Engine

from areas adjacent to weld line Manual, TASK 72-41-13-300-075,

on inner and outer walls Repair Scheme FRS5366. Do not thin

parent material below 0,98 mm.

(0.039in.)

Use portable grinding equipment

(5) Select replacement combustion Refer to Fig.3 and 3. Material

liner head section assembly Information

Parts

UL34277 Combustion liner head

section assembly

RB.211−72−9670

Aug.27/93 Page 9

Printed in Great Britain
(6) Clean weld edges of liner walls Refer to Fig.2

and head section assembly

OMat 508, Polishing buff

(7) Locally degrease all weld edges Engine Overhaul Processes Manual,

T.S.D.594-J, TASK 70-0000-100-101

(8) Assemble replacement head Refer to Fig.1 to 4.

section assembly and inner and Ensure correct radial and axial

outer liner walls into welding position

fixture

Tools

MH13432/2 Location clamp ring

(inner wall)

MH13775/2 Location clamp ring

(outer wall)

MH16253 Checking and welding fixture

MH13402 Location ring

(9) Argonarc tackweld around Refer to Fig.1 and 3.

circumference of combustion Engine Overhaul Processes Manual,

liner head assembly and inner T.S.D.594-J, TASK 70-00-00-300-409.

and outer wall joints Tack weld through location ring

slots.

Group 2 welds 12,7 mm. (0.500in.)

long

Tools

MH13406/1 Outer wall argon backing

block

MH13403/2 Inner wall argon backing

block

Welding Data

RB.211−72−9670

Aug.27/93 Page 10

Printed in Great Britain
Type of welding .. .. .. .. .. Argonarc DC output

Weld group .. .. .. .. .. .. Group 2

Filler material .. .. .. .. .. OMat 3/62 (C263 material)

Torch .. .. .. .. .. .. .. BOC 200 or any 200 amp water cooled

equivalent

Electrode .. .. .. .. .. .. 2 per cent thoriated tungsten

2,362 mm. (0.093in.) dia.

Current .. .. .. .. .. .. 20 to 25 amps

Gas flow .. .. .. .. .. .. 25 C.F.H. for torch

15 C.F.H. for backing

Polarity .. .. .. .. .. .. Negative

This data is given for guidance only. Optimum settings must be obtained

by trials.

(10) Remove tackwelded assembly from

fixture

(11) Planish joints at inner and outer

positions to produce good butt

joints

(12) Argonarc weld complete inner and Refer to Fig.1 and 3.

outer circumferential joints Refer to Engine Overhaul Processes

Manual, T.S.D.594-J, TASK

70-00-00-300-409 and Welding Data in

Operation 2.B.(9)

OMat 3/62 C263 material filler wire

Tools

MH13406/1 Outer wall apron backing

block

MH13403/2 Inner wall argon backing

block

(13) Fluorescent penetrant inspect Engine Overhaul Processes Manual,

welded areas T.S.D.594-J, TASK 70-00-00-200-210

or TASK 70-00-00-200-213. Reject if

cracked

(14) Inspect welds Engine Overhaul Processes Manual,

T.S.D.594-J, TASK 70-00-00-300-409,

Fig.70-00-00-990-409-003, 004, 005,

A06 and B06 butt weld acceptance

standards. Group 2 welds

RB.211−72−9670

Aug.27/93 Page 11

Printed in Great Britain
(15) Dress excess weld bead flush Maximum height of weld bead after

to parent material dressing to be 0,25 mm. (0.010in.).

Parent material must not be reduced

Use portable grinding equipment

(16) Dimensionally inspect Refer to Fig.1, 3 and 4 and Engine

Manual, TASK 72-41-13-300-072,

Repair Scheme FRS2518 - Basic Repair

Data.

Locate in check/weld fixture and

inspect liner wall positions

Tools

MH16253 Checking and welding

fixture

MH13432/2 Location clamp ring

(inner wall)

MH13775/2 Location clamp ring

(outer wall)

MH13434 Check gauge (inner wall)

MH13814 Check gauge (outer wall)

(17) Re-apply thermal barrier Refer to Fig.1 and 3 and Engine

coating to areas of weld joints Manual, TASK 72-41-13-300-075,

and apply to designated areas Repair Scheme FRS5366

in head assembly

(18) Select wire thread inserts Refer to Fig.11 and 3. Material

Information

Parts

AGS3707 Wire thread insert

(19) Fit wire thread inserts Refer to Fig.11 and Standard

Practices Manual, TASK

70-42-13-300-001, Repair Scheme

FRS3002. Fit wire thread insert

AGS3707, nominal unified thread size

0.250in. dia. x 28 T.P.I.

Tools

HC22892 Insert tool

3405528 Tang removal tool

RB.211−72−9670

Aug.27/93 Page 12

Printed in Great Britain
HCU5037 Thread gauge

(20) Check torque of inserts Tools

HC21740 Torque check plug

HC21743 Torque adapter

1704302 Torquemaster

(21) Inspect inserts Refer to Fig.11.

Ensure inserts are installed at

correct depth

(22) Cancel existing part number Existing Re-number

and adjacent to it re-identify

with new part number by UL16885 )

vibro-engraving UL26916 )

UL27107 ) UL34009

UL28972 )

UL28974 )

Use vibro-engraving equipment

C. Rework existing front combustion liner assy (UL16885, UL27107) (72-41-13

Fig./Item No.02250 - Part 2 of S.B.

Consumable Materials

OMat 508 Polishing buff

OMat 3/62 C263 material weld filler wire

Tools

Tool Number Description Function

MH13402 Location ring Locate combustion liner head

section and inner wall whilst

tack welding

MH13403/2 Argon backing block Supply argon backing whilst

welding replacement combustion

liner head section to combustion

liner inner wall

MH13406/1 Argon backing block Supply argon backing whilst welding

replacement combustion

liner head section to combustion

liner outer wall

RB.211−72−9670

Aug.27/93 Page 13

Printed in Great Britain
MH13432/2 Location clamp ring Locate combustion liner inner

(inner wall) wall whilst tack welding to

replacement combustion liner head

section. Locate during post weld

inspection

MH13434 Check gauge Post weld inspect position of

(inner wall) inner wall

MH13775/2 Location clamp ring Locate combustion liner outer

(outer wall) wall whilst tack welding to

replacement combustion liner head

section. Locate during post weld

inspection

MH13814 Check gauge Post weld inspect position of

(outer wall) outer wall

MH16253 Checking and Hold combustion liner component

welding fixture parts and tooling components

during tack welding and post

weld inspection

HC22892 Insert tool Insert wire thread insert

3405528 Tang removal tool Remove tang from fitted wire

thread insert

HCU5037 Thread gauge Inspect fitted wire thread insert

threads

HC21740 Torque check plug Check fitted wire thread insert

torque

HC21743 Torque adapter Check fitted wire thread insert

torque

1704302 Torquemaster Check fitted wire thread insert

torque

Procedure Supplementary Information

(1) Machine, to separate liner head Refer to Fig.5 and 6.

assembly from inner and outer Pack under front lip as required and

walls clamp to machine table. Cut into

head section leaving a trim

allowance on inner and outer walls.

Do not cut into meter panel assembly

inside head section, as the meter

panel assembly will be re-fitted

RB.211−72−9670

Aug.27/93 Page 14

Printed in Great Britain
Use vertical lathe

(2) Machine inner and outer walls Refer to Fig.5 and 6.

to length required for re-fitting Use vertical lathe

(3) Deburr

(4) Remove thermal barrier coating Refer to Fig.5 and 6 and Engine

from areas adjacent to weld line Manual, TASK 72-41-13-300-075,

on liner inner and outer walls Repair Scheme FRS5366. Do not thin

parent material below 0,98 mm.

(0.039in.)

(5) Remove existing meter panel Refer to Fig.5 and 6.

assembly from existing head Cut through head section assembly

section assembly forward of meter panel assembly at

inner and outer positions. Do not

cut into meter panel assembly.

Discard existing head section

assembly. Retain existing meter

panel assembly

Use vertical lathe or hand grinding

equipment

(6) Remove remnants of existing Refer to Fig.5 and 6.

head section assembly from Do not thin meter panel below

existing meter panel assembly minimum section allowed

Use hand grinding equipment

(7) Inspect existing meter panel Refer to Engine Manual, TASK

assembly for damage and repair 72-41-13-200-002-B01,

if required Inspection/Check

(8) Fluorescent penetrant inspect Engine Overhaul Processes Manual,

existing meter panel assembly T.S.D.594-J, TASK 70-00-00-200-210

and existing inner and outer or TASK 70-00-00-200-213. Reject

liner walls if cracked

(9) Select replacement head outer Refer to Fig.7 and 3. Material

shell section Information

Parts

UL34278 - Combustion liner head

outer shell

(10) Fit existing meter panel assembly Refer to Fig.7, 8 and 9 and Engine

to replacement head outer shell Manual, TASK 72-41-13-300-077,

section Repair Scheme FRS5449

RB.211−72−9670

Aug.27/93 Page 15

Printed in Great Britain
(11) Dimensionally inspect Refer to Fig.5, 7 and 9

(12) Clean weld edges of existing Refer to Fig.7.

liner walls and replacement OMat 508 Polishing buff

head section

(13) Locally degrease all weld edges Engine Overhaul Processes Manual,

T.S.D.594-J, TASK 70-00-00-100-101

(14) Assemble replacement head section Refer to Fig.5, 6, 7 and 10.

assembly and existing inner and Ensure correct radial and axial

outer liner walls into welding position

fixture

Tools

MH13432/2 Location clamp ring

(inner wall)

MH13775/2 Location clamp ring

(outer wall)

MH16253 Check and welding

fixture

MH13402 Location ring

(15) Argonarc tackweld around Refer to Fig.5 and 7

circumference of combustion Engine Overhaul Processes Manual,

liner head assembly and inner T.S.D.594-J, TASK 70-00-00-300-409.

and outer wall joints Tackweld through location ring

slots.

Group 2 welds 12,7 mm. (0.500in.)

long

Tools

MH13406/1 Outer wall argon backing

block

MH13403/2 Inner wall argon backing

block

Welding Data

RB.211−72−9670

Aug.27/93 Page 16

Printed in Great Britain
Type of welding .. .. .. .. .. Argonarc DC output

Weld group .. .. .. .. .. .. Group 2

Filler material .. .. .. .. .. OMat 3/62 (C263 material)

Torch .. .. .. .. .. .. .. BOC 200 or any 200 amp water cooled

equivalent

Electrode .. .. .. .. .. .. 2 per cent thoriated tungsten

0.093in. dia.

Current .. .. .. .. .. .. 20 to 25 amps

Gas flow .. .. .. .. .. .. 25 C.F.H. for torch

15 C.F.H. for backing

Polarity .. .. .. .. .. .. Negative

This data is given for guidance only. Optimum settings must be obtained

by trials.

(16) Remove tackwelded assembly from

fixture

(17) Planish joints at inner and outer

positions to produce good butt

joints

(18) Argonarc weld complete inner and Refer to Fig.5 and 7.

outer circumferential joints Refer to Engine Overhaul Processes

Manual, T.S.D.594-J, TASK

70-00-00-300-409 and Welding Data in

Operation 2.C.(15)

OMat 3/62 C263 material filler wire

Tools

MH13406/1 Outer wall argon backing

block

MH13403/2 Inner wall argon backing

block

(19) Fluorescent penetrant inspect Engine Overhaul Processes Manual,

welded areas T.S.D.594-J, TASK 70-00-00-200-210

or TASK 70-00-00-200-213. Reject if

cracked

(20) Inspect weld Engine Overhaul Processes Manual,

T.S.D.594-J, TASK 70-00-00-300-409,

Fig.70-00-00-990-409-003, 004, 005,

A06 and B06 butt weld acceptance

standards. Group 2 welds

RB.211−72−9670

Aug.27/93 Page 17

Printed in Great Britain
(21) Dress excess weld bead flush Maximum height of weld bead after

to parent material dressing to be 0,25 mm. (0.010in.).

Parent material must not be reduced

Use portable grinding equipment

(22) Dimensionally inspect Refer to Fig.5, 7 and 10 and Engine

Manual, TASK 72-41-13-300-072,

Repair Scheme FRS2518 - Basic Repair

Data. Locate in check/weld fixture and

inspect liner wall positions

Tools

MH16253 Checking and welding

fixture

MH13432/2 Location clamp ring

(inner wall)

MH13775/2 Location clamp ring

(outer wall)

MH13434 Check gauge (inner wall)

MH13814 Check gauge (outer wall)

(23) Re-apply thermal barrier Refer to Fig.5 and 7 and Engine

coating to areas of weld joints Manual, TASK 72-41-13-300-075,

and apply to designated areas Repair Scheme FRS5366

in head assembly

(24) Select wire thread inserts Refer to Fig.11 and 3. Material

Information

Parts

AGS3707 Wire thread insert

(25) Fit wire thread inserts Refer to Fig.11 and Standard

Practices Manual, TASK

70-42-13-300-001, Repair Scheme

FRS3002. Fit wire thread insert

AGS3707, nominal unified thread size

0.250in. dia. x 28 T.P.I.

Tools

HC22892 Insert tool

3405528 Tang removal tool

RB.211−72−9670

Aug.27/93 Page 18

Printed in Great Britain
HCU5037 Thread gauge

(26) Check torque of inserts Tools

HC21740 Torque check plug

HC21743 Torque adapter

1704302 Torquemaster

(27) Inspect inserts Refer to Fig.11.

Ensure inserts are installed at

correct depth

(28) Cancel existing part number Existing Re-number

and adjacent to it re-identify

with new part number by UL16885 ) UL34266

vibro-engraving UL27107 )

Use vibro-engraving equipment

D. The front combustion liner assembly reworked as detailed in this Service

Bulletin is interchangeable with existing. Remove and install in accordance

with current overhaul procedure (Engine Manual, 72-41-13, Removal and

Installation, 72-41-00, Disassembly and Assembly).

E. A record of accomplishment is required.

RB.211−72−9670

Aug.27/93 Page 19

Printed in Great Britain
Instructions for removing inner and outer walls

Fig.1

RB.211−72−9670

Aug.27/93 Page 20

Printed in Great Britain
Section through combustion liner showing wall and head separation

Fig.2

RB.211−72−9670

Aug.27/93 Page 21

Printed in Great Britain
Section through combustion liner showing addition of new head assembly

Fig.3

RB.211−72−9670

Aug.27/93 Page 22

Printed in Great Britain
Section AL (see Fig.3) combustion liner

Fig.4

RB.211−72−9670

Aug.27/93 Page 23

Printed in Great Britain
Instructions for removing inner and outer walls

Fig.5

RB.211−72−9670

Aug.27/93 Page 24

Printed in Great Britain
Section through combustion liner showing wall and head separation

Fig.6

RB.211−72−9670

Aug.27/93 Page 25

Printed in Great Britain
Section through combustion liner

Fig.7

RB.211−72−9670

Aug.27/93 Page 26

Printed in Great Britain
View on arrow AD (see Fig.6) combustion liner

Fig.8

RB.211−72−9670

Aug.27/93 Page 27

Printed in Great Britain
Section AJ (see Fig.8) combustion liner

Fig.9

RB.211−72−9670

Aug.27/93 Page 28

Printed in Great Britain
Section AC (see Fig.7) combustion liner

Fig.10

RB.211−72−9670

Aug.27/93 Page 29

Printed in Great Britain
Section through combustion liner

Fig.11

RB.211−72−9670

Aug.27/93 Page 30

Printed in Great Britain
3. Material Information

NOTE: For unit list prices, see supplement to this bulletin.

I.P.C.

Fig./ New Old Instructions

Item Part No. Qty Keyword Mat. Part No. Disposition

________________________________________________________________________________

A. The kit required consists of the following parts:

All engines and modules

72-41-13

Parts 1 and 2 of S.B.

02262 AGS3707 54 Insert, wire thread QED AGS3707 (5)

(0.250in. dia.) (VU1653)

Part 1 of S.B.

02274 UL34277 1 Head section assy - UL14459 (1)(4)

combustion liner

Part 2 of S.B.

02274 UL34278 1 Head assy - outer - UL25911 (1)(4)

shell section

B. Parts to be reworked:

All engines and modules

72-41-13

Part 1 of S.B.

02250 UL34009 1 Liner assy, combustion - - UL16885)

front UL26916)

UL27107) (1)(2)

UL28972)

UL28974)

Part 2 of S.B.

02250 UL34266 1 Liner assy, combustion - - UL16885) (1)(3)

front UL27107)

RB.211−72−9670

Aug.27/93 Page 31

Printed in Great Britain
C. New production parts:

The following parts will be made available as future spares in addition to

that listed under A. and B.

None

D. Instructions disposition codes:

(1) Old and new parts are freely and fully interchangeable.

(2) For rework refer to Fig.1 to 4 and 11.

(3) For rework refer to Fig.5 to 11.

(4) Not available as a spare for replenishment purposes.

(5) Old part destroyed during rework.

RB.211−72−9670

Aug.27/93 Page 32

Printed in Great Britain
Family tree - Front combustion liner head sections and meter panels Sheet 1 of 4

RB.211−72−9670

Aug.27/93 Page 33

Printed in Great Britain
Family tree - Front combustion liner head sections and meter panels Sheet 2 of 4

RB.211−72−9670

Aug.27/93 Page 34

Printed in Great Britain
Family tree - Front combustion liner head sections and meter panels Sheet 3 of 4

RB.211−72−9670

Aug.27/93 Page 35

Printed in Great Britain
Family tree - Front combustion liner head sections and meter panels Sheet 4 of 4

RB.211−72−9670

Aug.27/93 Page 36

Printed in Great Britain
Family tree - Front combustion liner Sheet 1 of 6

RB.211−72−9670

Aug.27/93 Page 37

Printed in Great Britain
Family tree - Front combustion liner Sheet 2 of 6

RB.211−72−9670

Aug.27/93 Page 38

Printed in Great Britain
Family tree - Front combustion liner Sheet 3 of 6

RB.211−72−9670

Aug.27/93 Page 39

Printed in Great Britain
Family tree - Front combustion liner Sheet 4 of 6

RB.211−72−9670

Aug.27/93 Page 40

Printed in Great Britain
Family tree - Front combustion liner Sheet 5 of 6

RB.211−72−9670

Aug.27/93 Page 41

Printed in Great Britain
Family tree - Front combustion liner Sheet 6 of 6

RB.211−72−9670

Aug.27/93 Page 42

Printed in Great Britain
Family tree - Front combustion liner Sheet 1 of 5

RB.211−72−9670

Aug.27/93 Page 43

Printed in Great Britain
Family tree - Front combustion liner Sheet 2 of 5

RB.211−72−9670

Aug.27/93 Page 44

Printed in Great Britain
Family tree - Front combustion liner Sheet 3 of 5

RB.211−72−9670

Aug.27/93 Page 45

Printed in Great Britain
Family tree - Front combustion liner Sheet 4 of 5

RB.211−72−9670

Aug.27/93 Page 46

Printed in Great Britain
Family tree - Front combustion liner Sheet 5 of 5

RB.211−72−9670

Aug.27/93 Page 47

Printed in Great Britain
Family tree - Front combustion liner Sheet 1 of 2

RB.211−72−9670

Aug.27/93 Page 48

Printed in Great Britain
Family tree - Front combustion liner Sheet 2 of 2

RB.211−72−9670

Aug.27/93 Page 49

Printed in Great Britain

ENGINE - COMBUSTION SECTION - IMPROVED PACKAGE 1 COMBUSTION LINER HEAD IN C263 MATERIAL

AND LOCAL THICKENED DIFFUSER WALLS AROUND STRUTS - MOD.72-9670

SUPPLEMENT - PRICES AND AVAILABILITY

This is a technical document not a quotation; any prices and delivery given are in

good faith without engagement.

Alternative parts may be supplied instead of parts listed. See Material Information

disposition instructions.

1. Modification Kit

Not applicable. Parts supplied as single line items.

Future spares will be supplied to this Service Bulletin standard when existing

stocks of parts have been used up; approximately July 1994

2. New production or reworked parts

Unit Price

Part No. Qty U.S. Dollars

UL34009 1

UL34266 1

AGS3707 54

UL34277 1

UL34278 1

3. Tools

Delivery can commence in 20 weeks from receipt of order.

Unit Price

Tool No. U.S. Dollars

MH13402 837.00

MH13403/1 1415.00

MH13406/1 1416.00

MH13432/1 1869.00

MH13434 418.00

MH13775/2 2452.00

MH13814 375.00

MH16253 17210.00

HC22892 317.00

3405528 38.70

HCU5037 138.00

HC21740 144.00

HC21743 144.00

RB.211−72−9670

Aug.27/93 Supplement Page 1 of 2

Printed in Great Britain
1704302 73.20

RB.211−72−9670

Aug.27/93 Supplement - Page 2

Printed in Great Britain